Gas cock



T. H. ROBERTS March 31, 1 936.

GAS COCK Filed April 18, 1932 2 Sheets-Sheet l March 31, 1936. H ER'T2,035,762

GAS COCK Filed April 18, 1932 2 Sheets-Sheet 2 J Y 1 9 42% I g /9 Q x /636 3/3 7 /5 38 Z Z X2 7 714227.23 A Zaafs q my. I W

Patented Mar. 31, 1936 UNITED STAES GAS COCK Thomas H. Roberts, Detroit,Mich, assignor to Roberts Brass Man ufacturin'g Company, De-

trolt, Mich, a corporation of Michigan Application April 18,1932, SerialNo. 606,027 9 Claims. (Cl. 251164) This invention relates generally tovalves and refers more particularly to gas valves of the rotary plugtype designed for use in connection with double burners in ovens and thelike.

5 In the accompanying drawings:

Figure l is a perspective view of a valve embody ng y invention;

Figure 2 is a perspective view of the parts forming the valv 10 Figure 3is a fragmentary perspectiveview' of the valve with parts broken awayand showing the passage 25 in registration with the inlet passage 5; a

Figure 4 is a fragmentary perspective view of 15 the valve with partsbroken away and showing the position of the washer 35 when the valve isin fully closed position;

Figure 5 is a vertical sectional view through the valve and showing theposition of the parts when the passage 23 is in registration with theinlet Figure 6 is a fragmentary sectional view through the valve takenat substantially right angles to Figure 5;

25 Figure 7 is a top plan view of the valve with the cap and handleremoved and showing the position of the parts when the passage 23 is inregistration with the inlet passage 5;

Figure 8 is a sectional view taken oniflie-"line 30 8-8 of Figure 5;

Figure 9 is a view similar to Figure 7 but sh9wing the position of theparts when the passages 23 and 25 are in registration with the passages3 and 9;

35 Figure 10 is a view similar to sages 23 and 25 respectively are inregistration with the passages 8 and 9;

Figure 11 is a view similar to Figure 7 but 40 showing the position ofthe parts when the passage 25 is in registration with the passage 5;

Figure 12 is a view similar to Figure 8 but showing the position of theplug when the passage 25 is in registration with the passage 5.

45 Referring now to the drawings, A is the casing; B is the cap; C isthe rotary plug; and D is the handle stem of a valve embodying myinvention. As shown, the casing A is a casting having a central portionl and the laterally pro- 5 jecting L-shaped portions 2 and 3respectively. Preferably the central portion I is provided with atapered socket 4 and a transversely extending inlet passage 5, while thewing portions 2 and 3 are provided at their free ends with threaded 55sockets 6 and 1 respectively and are provided Figure 8 but showing theposition of the plug when the pas:

with outlet passages 8 and 9 respectively that extend from diametricallyopposite sides of the socket 4' to the inner ends of the sockets 6 andI. Preferably the central portion I of the casing isprovided at the openend of and around approx- 5 imately half the socket 4 with an arcuaterecess l0 and isprovided in said end at substantially diametricallyopposite points of the socket with threaded sockets II and I2respectively.

The cap B is preferably formed of sheet metal 10 and has a cup-shapedportion l3 registering with the open end of the socket 4 and is providedat diametrically opposite points of said cup-shaped portion withlaterally projecting attaching flanges l4 and I5 respectively which aresecured 15 I to the central portion l of thecasting by screws l6 and I1respectively engaging the sockets II and I2. Preferably the cup-shapedportion l3 has a central opening l8, an annular flange or shoulder l9concentric with the opening, and radially extending slots 20 and 2|respectively at approximately diametrically opposite 'sides of theopening. o

The rotary plugf'C fits in the socket 4 and is provided in its outer endwith a substantially cylindrical socket 22. As shown the plug terminatesflush with the outer end of the socket 4 and is provided intermediateits ends with three --passages 23, 24 and 25 respectively that extendtransversely thereof in a common horizontal plane and meet at thecenter. Preferably passages 23 and 25 are in alignment, while thepassage 29 is disposed at substantially right angles to the passages 23and 25.

'The handle stem D has a cylindrical portion 5 26 in the opening ill inthe cap, has an annular flange 21 engaging the inner side 28 of the cap,and has a substantially rectangular portion 29 in the cylindrical socket22. Preferably the rectangular portion 29 of the stem has a downwardlyopening sl bstantially cylindrical socket 30 and is provided atdiametrically opposite sides of said socket with transversely extendingslots 3| and 32 respectively. A pin 33 extending diametrically acrossthe socket 22 in the plug and into the recess ID in the casing isreceived in the socket 30 and slots 3| and 32, while a coil spring 34within the socket 30 abuts the pin 33 and normally holds the flange 21of the stern against the inner face 28 of the cap. A washer 35 isnon-rotatably sleeved upon the rectangular portion 29 of the stem andhaslaterally projecting lugs 36 and 3'! respectively'that are engageablewith the slots 29 and 2| in the cap, and a coil spring 38 is sleevedupon the rectangular portion 29 of the stem between the upper end of theplug C and the washer 35 and normally holds the lugs 36 and, 31 of thewasher against the flange IQ of the cap.-

Inuse when the parts are in the position illustrated in Figures 9 and10, the valve is fully closed. In this position the pin 33 issubstantially midway between the ends 40 and 4| respectively of thearcuate slot ID in the casing and the lugs 36 and 31 are in the slots 20and 2|. Thus the plug is locked against axial rotation. Should it bedesired to have gas flow through the outlet 8, the handle stem D theflange 21 will move the washer .35 downwardly and cause the lugs 36 and31 to be. removed from the slots 20 and2| whereupon the plug C may beturned by the stem D to cause the passage 23 to register with the inlet5. (Figures 7 and 8.) When in this position the pin 33 will abut the end40 of the recess I and the lugs 36 and 31 of the washer will be held bythe spring 38 against the flange l9 oi'the cap. Upon turning the plug Cfrom the position illustrated in Figures '1 and 8 to the positionillustrated in Figures 9 and 10 the lugs 36 and 31 will slide on theflange 9 until they are in vertical alignment with the slots and 2|whereupon they will be moved upwardly in said slots by the spring 38 andthe plug C will again be locked in closed position against axial turningmovement. Should it be desired to have gas flow through the outlet 9,the handle stem D may be depressed so that the flange 21 will move thewasher 35 downwardly and cause the lugs 36 and 31 to be removed from theslots 20 and 2| whereupon the plug C may be turned by the stem D tocause'the passage to register'with the inlet 5. (Figures 11 and 12.)When in this position the pin 33 will abut the end 4| oi the recess l0and the lugs 36 and 31 of the washer 35 will be held by the spring 38against the flange IQ of the cap. Upon turning the plug C from theposition illustrated in Figures 11 and 12 to the position illustrated inFigures 9 and 10, the lugs 36 and 31 will slide on the flange l9 untilthey are in vertical alignment with the slots 20 and 2| whereupon theywill be moved upwardly in said slots by the spring 38 and theplug C willagain be locked in closed position. I! desired the plug .0 may be turnedfrom the open position illustrated in Figures 11 and 12 to the openposition illustrated in Figures 7 and 8 or vice versawithout beinglocked in the intermediate closed position illustrated in Figures 9 and10 by pressing the handle stem D inwardly against the tension of spring34 while it is being turned so that the lugs 36 and 31 of the washerwill pass beneath and behind the slots 20 and 2|.

Thus from the foregoing it will be apparent that I have provided asafety gas valve wherein the plug C will be locked automatically in theclosed position illustrated in Figures 9 and 10 when the handle stem Dis operated normally, 1. e., merely turned without being movedlongitudinally, but that may be moved from one open positionto the otherwithout being locked when the handle stem D is operated abnormally, i.e., pressed-inwardly while it is turned. Regardless of how the stem D isturned, i. e., merely turned or held inwardly while being turned, theoutlet passage 8 is closed before the outlet passage 9 is opened andvice versa, therefore, only one outlet is open at any one time. When theplug C is in the closed position illustrated in Figures 9 and 10the'handle stem D must be pressed inwardly to release the lugs 36 and 31from the may be depressed so that.

slots 20 and 2| when it is desired to turn the plug to either of the twoopen positions aforesaid. Thus the valve can not he accidentally opened.Both springs 34 and 38 retain the plug C in the socket. The spring 34urges the handle stem D outwardly, while the spring 38 urges the washer35 against the cap. The pin 33 serves as an abutment or seat for thespring 34 as well as a. stop for theplug C, consequently an extremelypractical and efiicient construction is provided.

What I claim as my invention is: I 1. In a valve, a casing having asocket and an arcuate recess around the socket, a rotary plug in thesocket and having a socket, a pin extending diametricallyof the socketin the plug and in the recess, a cap for the casing, a handle stemextending through the cap into the socket in the plug and having asocket and slots receiving the pin, a flange on the stem engageablewith.the cap, and a spring in the socket in the stem seated on the pinand urging the flange against the cap.

2. In a valve, a casing having a socket and'an' arcuate recess aroundthe socket, a rotary plug flange'on the stem engageable with the cap, a

lock washer non-rbtatably sleeved upon and movable longitudinally of thestem, said lock washer having a projection engageable with the slot inthe cap, yieldable means between the plug and lock washer urging thelatter toward the cap, and yieldable meansln the socket in the stemseated on the pin and urging the flange toward the cap.

3. In a valve, a casing having a socket and an arcuate recess around thesocket, a rotary plug in the socket in the casing and having a socket, apin extending diametrically of the socket in the plug and in the recess,said pin being engage able with opposite ends of the recess to limitrotary movement of the plug, a cap for the casing having slots atdiametrically opposite points thereof, a handle stem extending throughthe 'cap into the socket in the plug and having a socket and slotsreceiving the pin, a flange on the stem engageable with the cap toprevent withdrawal oi the stem from the plug, means for holding the stemagainst turning movement includ ing a washer. non-rotatably sleeved uponbut movable longitudinally of the stem, said washer having lugs atdiametrically opposite points thereof engageable with the slotsaforesaid in the cap, yieldable means between the plug and washer urgingthe latter toward the cap, and

'yieldable means in the socket in the stem seated on the pin and urgingthe flange toward the cap, the yieldable means aforesaid permittinglongitudinal movement of the stem relative to the plug and pin, and saidflange and washer being constructed and arranged in such a way that thelugs of the washer will be removed from the slots in the cap by theflange on the stem when the latter is moved longitudinally.

4. In a valve, a casing having a socket, a rotary plug in the socket inthe casing and having a socket, a pin extending diametrically of thesocket in the plug, a cap for the casing, a handle stem extendingthrough the cap into the socket in the plug and having a socket andslots receiving the pin, a projection on the stem engageable with thecap, and a spring in the socket in the stem seated on the pin and urgingthe projection against the cap.

5. In a valve, a casing having a socket, a rotary plug in the socket inthe casing and having a socket, a pin extending diametrically of thesocket in the plug, a cap for the casing, a handle stem extendingthrough the cap into the socket,

in the plug and having a socket-and slots receiving the pin,a-projection on the stem engageable with the cap to limit outwardmovement of the stem relative to the plug, a spring in the socket .plugin the socket in the casing and having a socket, a cap for the casing, ahandle stem extending through the cap and slidably but nonrotatablyengaging the socket in the plug, a projection on the stem engageablewith the cap to limit outward movement of the stem relativeto the plug,a spring engaging the stern and urging the projection against the cap, awasher on the stem between the plug and projection engageable with thecap to control rotary movement of the plug, said washer being spacedfrom and free of the plug, and a spring around the stem in the spacebetween the plug and washer, said washer being movable by the projectionout of engagement with the cap and movable by the last mentioned springinto engagement'with the cap.

'7. In a valve, a casing having a socket, a rotary plug in the socket inthe casing and having a socket, a pin extending diametrically of thesocket in the plug, a' cap for the casing having a slot therein/a handlestem extending through the cap into the socket in the plug and having asocket and slots receiving the pin, a projection on the stem engageablewith the cap, a washer non-rotatably sleeved upon and movablelongitudinally of the stem, said washer engageable with the slot in themeans between the plug and washer urging the latter toward the cap, andyieldable means in the socket in the stem seated on the pin and urg-.ing the projection toward the cap.

8. In a valve, a casing having a socket, a rotary plug in the socket inthe casing and having a socket,,a pin extending diametrically of thesocket,,in the: plug, a cap for the casing having slots at diametricallyopposite points thereof, a handle stem extending through the cap intothe socket in the plug and having a socket and slots receiving the pin,a projection on the stem engageable with the cap to prevent withdrawalof the stem from the plug, means for holding the tem against turningmovement including a washer non-rotatably sleeved upon but movablelongitudinally of the stem, said washer having lugs at diametricallyopposite points thereof engageable with the slots aforesaid in the cap,yieldable means between the plug and washer urging the latter toward thecap, and yieldable means in the socket in the. stem seatedonthe pin andurging the projection toward the cap.

9. A valve comprising a casing having a socket, a rotary plug in saidsocket, a stem for rotating said plug slidablyinterlocked therewith, acap for said casing having an opening for said stern, means for checkingrotary movement of said plug including a washer ,slidably andnon-rotatably mounted on said stem in spaced relation to the plug andhaving a portion engageable with a recess in the cap, and a springsurrounding the stem between the plug and washer, said spring urging thewasher toward the cap, a projection on the stem engageable with the capto limit withdrawal of the stem and engageable with the washer to renderthe checking means inoperative, and means associated with said stem forholding the projection against the cap in an inoperative positionrelative to said checking means regardless of the position of saidwasher relative to the recess in said cap.

THOMAS H. ROBERTS.

having a part cap, yieldable

